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Finding the Fourth Proportional to 388,421.68, 536,101.32 and 245,085.16

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Solution

The fourth proportional to 388,421.68, 536,101.32 and 245,085.16 is: 338,267.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,421.68 : 536,101.32 = 245,085.16 : x
  2. Step 2: Convert to fraction form
    388,421.68/536,101.32 = 245,085.16/x
  3. Step 3: Cross multiply
    388,421.68x = 536,101.32 × 245,085.16
  4. Step 4: Simplify right side
    388,421.68x = 131,390,477,788.41
  5. Step 5: Solve for x
    x = 131,390,477,788.41/388,421.68
  6. Step 6: Final answer
    x = 338,267.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.